The Attorney General's Office said Harrison Lambert, 23, was shot by at least one of the two officers who were called to a Joppa Road home about 12:20 p.m.

Lambert was airlifted to a Boston hospital. Neither of the officers was injured.

Neighbor Keith Wilhelm was home with his family when he heard gunshots.

"I had a baby here visiting and I was a little concerned for a few minutes," Wilhelm said.

Officials said the call involved a report of a man threatening his father with a knife. The two officers encountered Lambert standing at the end of the driveway and he was armed with a knife, investigators said.

Herb Mosher has lived nearby for more than 50 years, but he has never seen anything like this.

"The local boys always have their things going on, but nothing malicious that I know of," Mosher said.

Officials said the investigation into the incident is ongoing and that neighbors are not in danger. Authorities said the officers involved will be placed on administrative leave.

There were no details released about what prompted the shooting, and the officers' identities were not revealed.